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塔河油田6-7区石炭系卡拉沙依组顶部砂体对比探讨

石油实验地质

2011年 33卷第S1期

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Title

Comparison of sandbody,top of Carboniferous Karashayi Formation,district 6-7,Tahe Oil Field

作者

杜伟维张荣

Authors

Du Weiwei Zhang Rong

单位

中国石化西北油田分公司勘探开发研究院,乌鲁木齐 830011

Organization

Research Institute of Petroleum Exploration & Production,SINOPEC Northwest Company,Urumqi,Xinjiang 830011,China

摘要

塔河油田6-7区石炭系高产井出油砂体主要位于卡拉沙依组顶部,砂体规模小,厚度薄。在地震分辨率难以识别薄砂体的情况下,利用卡拉沙依组地层厚度变化推断砂体尖灭线位置。在地层厚度变化较大的地方,容易形成有利的岩性圈闭。利用子波分解去T05强轴技术,去除大套地层的强反射,突出薄砂体的弱反射信息,识别薄层砂体平面上的分布范围。

Abstract

In district 6-7 of the Tahe Oil Field, oil sands in high-yielding wells mainly locate at the top of Carboniferous Karashayi Formation. The sandbodies have small scale and thin thickness. When seismic resolution fails to identify thin sandbody, we can use the formation thickness changes of Karashayi Formation to predict the location of sandbody pinch-out boundary. Favorable lithologic traps may generate at where formation thickness changes obviously. We use wavelet decomposition to remove T50 strong reflection. The strong reflection of big formation is removed, and the weak reflection of thin sandbody is strengthened, which may help to identify the plane distribution range of thin sandbody.

关键词：

砂体对比; 砂岩尖灭线; 子波分解; 卡拉沙依组; 塔河油田;

Keywords:

sandbody correlation; sand pinch-out line; wavelet decomposition; karashayi Formation; Tahe Oil Field;

基金项目

DOI

https://doi.org/10.11781/sysydz2011S1001